(defineC (sum a b c) (+ a b c))
(sum 1)					; => <function>
((sum 1) 2)				; => <function>
(sum 1 2)				; => <function>
(((sum 1) 2) 3)				; => 6
(sum 1 2 3)				; => 6

(defineC (minus a b c d) (- a b c d))
(minus 10)				; => <function>
(minus 10 3 2)				; => <function>
(minus 10 3 2 1)			; => 4
((minus 10 3) 2 1)			; => 4
((minus 10 3 2) 1)			; => 4

